/Engine/Plugins/Runtime/GeometryCache/Source/GeometryCache/Classes/GeometryCacheTrack.h
SetMatrixSamples, Set the Matrix animation Samples
void
virtual void SetMatrixSamples ( const [TArray](API\Runtime\Core\Containers\TArray)< FMatrix > & Matrices, const [TArray](API\Runtime\Core\Containers\TArray)< float > & SampleTimes )